You might have noticed #NewHarryPotterBooks has been trending on Twitter all day, causing hilarity for some but upset and ire for others.

People have been posting (mostly) witty names for possible new Harry Potter books, although at first glance you might be duped into thinking JK Rowling has her pen and paper out to continue the series.

Not so, and this is, unsurprisingly, what's getting on Harry Potter fandom's wick.

They've been taking to Twitter to vent their upset and fury, with posts that are even funnier than the original trend.

Check out a mix of the best #NewHarryPotterBook tweets and reactions here: